<?php
/*
作者 : shyhero
*/
class Person{ //声明一个Person类
  public $age;
  private $name;
  protected $sex;
  public function __construct($age="",$name="",$sex=""){
   $this -> age = $age;
   $this -> name = $name;
   $this -> sex = $sex;
  }
  public function say(){
   return $this -> age." ".$this -> name." ".$this -> sex;
  }
  function __sleep(){ //指定串行化时能提取的成员属性,没有参数,但是必须返回一个数组
   $arr = array("age","name");
   return $arr;
  }
  function __wakeup(){ //指定反串行化时,提取出来的值
   $this -> sex = "woman";
  }
}